GraphicsLayerPaintBehavior should be a OptionSet Would make it a bit more conformant to other code and easier to work with.
<rdar://problem/109031023>
Pull request: https://github.com/WebKit/WebKit/pull/13569
Committed 263790@main (12f69a0befe1): <https://commits.webkit.org/263790@main> Reviewed commits have been landed. Closing PR #13569 and removing active labels.